Boat hull



uly 1962 F. FARRINGTON :BOAT HULL 2 Sheets-Sheet 1 Filed Dec. 11 .1959

INVENTOR. Ways? Zfl far/17292 027 A 77'0E VE KS y 1962 F. w. FARRINGTON 3,045,629

BOAT HULL 2 Sheets-Sheet 2 Filed Dec. 11, 1959 United States Patent 3,045,629 BOAT HULL Floyd W. Farringtou, 1638 Wynne, San Angelo, Tex. Filed Dec. 11, 1959, Ser. No. 858,971 3 Claims. (Cl. 11456) in hard fast turns and which substantially reduces the rolling tendency of the hull in making turns.

Another object of the invention is to provide a hull bottom structure of the character indicated above which has unusually wide chines and depending longitudinal planes or fins extending along the outward or outboard sides of the chines, in the region of the stern of the hull, which cooperate to stabilize the hull in water and reduce sideslipping in making turns.

A further object of the invention is to provide a simple and uncomplicated hull bottom structure of the character indicated above, which is relatively easy and inexpensive to construct, and which presents no unusual impediments to shallow water operation of the hull, or to beaching, trailering, or storing of the hull.

Other important objects and advantageous features of the invention will be apparent from the following description and the accompanying drawings, wherein, for purposes of illustration only, a specific form of the invention is set forth in detail.

In the drawings:

FIGURE 1 is a bottom plan view of a boat hull of the invention;

FIGURE 2 is a side elevation thereof;

FIGURE 3 is an enlarged bottom perspective view thereof;

FIGURE 4 is a rear perspective view thereof;

FIGURE 5 is an enlarged fragmentary bottom plan view of a side of the hull bottom; and

FIGURE 6 is a fragmentary vertical transverse section taken on the line 66 of FIGURE 5.

Referring in detail to the drawings, wherein like numerals designate like parts throughout the several views, the illustrated boat hull, generally designated 10, comprises a forwardly canted stem or prow 12 from which hull sides 14 extend rearwardly, the sides 14 having convergently curved forward portions 15, meeting at the stem 12, and substantially straight and slightly rearwardly converging rear portions 16, which are joined to related ends of a vertical transom 18.

The hull further comprises a bottom structure, generally designated 20, which comprises a bottom 22 which extends between the lower end of the stem 12 and the lower end of the transom 18. The longitudinal center part of the bottom 22 is below the level of the lower edges 24 of the hull sides 14, and at its forward part 26 the bottom 22 curves convexly, both longitudinally and laterally, as to the lower end of the stem 12 and up to the lower edges 24 of the hull sides. The main part 28 of the bottom 22, between the forward part 26 and the transom 18 is substantially uncurved lengthwise of the hull.

The main part 28 of the bottom 22 is not fiat, but is of modified round-bottom contour, with a relatively flat central longitudinal portion 30 and laterally and upwardly curved and relatively narrow side portions 32. The main bottom portion 28, together with the forward part 26, are narrower than the reach or width between the lower edges 24 of the hull sides 14, and flat horizontal chines 34 extend along the outer sides of the narrow 3,045,629 Patented July 24, 1962 chines 34 are of unusually great width so as to provide relatively large areas to bear against the water, when the hull tilts as it is steered or goes into a turn, whereby rolling of the hull is reduced and arrested.

For reducing and controlling side-step of the hull 10, in hard and fast turns, in the execution of which, especially when the hull is propelled by an outboard motor mounted on the transom 18, the stern of the hull tends to slew or side-slip, longitudinal fins or water-foils 36 are provided, which extend along and depend from the hull bottom 22 in line with the lower edges 24 of the hull sides 14.

The fins 36 extend rearwardly, from points 38 located near to and spaced forwardly from the transom 18, to the transom 18. The fins 36 have preferably rounded lower edges which are composed of straight main portions 38 and forwardly and upwardly curved forward end portions 40, which are flared into the chines 34. The laterally outward or outboard sides of the chines are flush with the outboard surfaces of the hull sides 14.

As shown in FIGURE 6, the fins 36 are disposed in right angles to the surfaces of the chines B4 and are spaced from the curved bottom side portions 32 at a distance, on the order of between three and four times the thickness or cross section of the fins, and that the upper edges of the fins 36 do not reach below the central longitudinal part of the bottom 22.

The fins 36, the curved bottom side portions 32, and the parts of the chines 34 subtended by the fins, form water chutes in which rearwardly moving water, produced by forward travel of the hull 10, is compressed in a manner to form rearwardly projected reaction, streams which tend to resist lateral swinging of the stern of the hull when executing a turn, "and the sides of the fins and the curved bottom side portions provide bearing areas which forcibly bear laterally against the water, as the hull is turned, so that side-slipping is reduced and arrested. Further, the fins 36 have runner or water foil action in the water which tends to keep the hull in straight forward travel, as does a shallow rounded keel 42 which extends centrally and conformably along the forward and main bottom portions. The keel 42 extends rearwardly from the stem 12 to a point slightly rearwardly of the forward ends of the fins 36, where it terminates in an upwardly rounded rear end 44.

Although there has been shown and described herein a preferred form of the invention, it is to be understood that the invention is not necessarily confined thereto, and that any change or changes in the structure of and in the relative arrangements of components thereof are contemplated as being within the scope of the invention as defined by the claims appended hereto.

What is claimed is:

1. A boat hull comprising a bottom having a substantially flat longitudinal central portion, and upwardly and laterally outwardly curved portions at opposite sides of and extending along said central portion, said bottom having flat chines reaching laterally outwardly from and extending along said curved portions, upstanding hull sides at the outward edges of the chines and reaching rearwardly to the transom, longitudinal fins depending from and extending forwardly along the chines from the transom, said fins being narrower than the chines and being spaced laterally outwardly from said curved bottom portions, said fins being relatively short relative to the length of the hull and having terminal forward ends.

2. A boat hull comprising a bottom having a substanand extending along said central portion, said bottom having flat chines reaching laterally outwardly from and extending along said curved portions, upstanding hull sides at the outward edges of the chines and reaching rearwardly to the transom, longitudinal fins depending from and extending forwardly along the chines from the transom, said fins being narrower than the chines and being spaced laterally outwardly from said curved bottom portions, said fins being relatively short relative to the length of the hull and having terminal forward ends, the forward ends of the fins being upwardly and forwardly curved and merging into the surfaces of the chines.

3. A boat hull comprising a bottom having a substantially flat longitudinal central portion, and upwardly and laterally outwardly curved portions at opposite sides of 15 and extending along said central portion, said bottom having flat chines reaching laterally outwardly from and extending along said curved portions, upstanding hull sides at the outward edges of the chines and reaching rearwardly to the transom, longitudinal fins depending from and extending forwardly along the chines from the transom, said fins being narrower than the chines and being spaced laterally outwardly from said curved bottom portions, said fins being relatively short relative to the length of the hull and having terminal forward ends, and a shallow centered keel extending rearwardly along said central portion of the bottom, said keel having a rear end terminating at the forward ends of the fins.

References Cited in the file of this patent UNITED STATES PATENTS 2,044,771 Carr June 23, 1936 2,234,899 Higgins Mar. 11, 1941 2,816,298 Foster Dec. 17, 1957 

